Cusick No.1 Reservoir Report

Last Updated: December 5, 2025

Cusick No.1 is a privately owned Earth dam located in Juneau, Wisconsin, along the Tiedtke Valley Creek.


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Summary

Built in 1970 by the USDA NRCS, this dam stands at a height of 31.4 feet and has a storage capacity of 100 acre-feet, with a normal storage level of 60 acre-feet. The dam's primary purpose is classified as "Other," and it serves as a vital component in managing water resources in the area.

Despite being categorized as a low hazard potential structure with fair condition assessment, Cusick No.1 is subject to regular state inspection and enforcement by the Wisconsin Department of Natural Resources. The dam features a controlled spillway with a width of 17 feet, and can discharge up to 33 cubic feet per second in case of excess water flow. The risk assessment for this dam is rated as "Very High (1)," highlighting the importance of ongoing monitoring and risk management measures in place.

With its strategic location and function in regulating water flow along the Tiedtke Valley Creek, Cusick No.1 plays a crucial role in mitigating potential flood risks and ensuring water resource sustainability in the region. Its association with the USDA NRCS and adherence to state regulatory standards underscore its commitment to effective dam management practices, making it a significant asset for water resource and climate enthusiasts to monitor and study.

Year Completed

1970

Dam Length

400

Dam Height

31.4

River Or Stream

TIEDTKE VALLEY CREEK

Primary Dam Type

Earth

Surface Area

7.3

Hydraulic Height

26

Drainage Area

0.5

Nid Storage

100

Structural Height

31.4

Hazard Potential

Low

Nid Height

31
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.